Enhanced bonding behavior of multi-walled carbon nanotube cement composites and reinforcing bars

被引：21

作者：

Lee, Heeyoung ^{[1
]}

Jeong, Seongho ^{[2
]}

Cho, Sanghyeon ^{[2
]}

Chung, Wonseok ^{[2
]}

机构：

[1] Chosun Univ, Gwangju, South Korea

[2] Kyung Hee Univ, Seoul, South Korea

来源：

COMPOSITE STRUCTURES | 2020年 / 243卷

基金：

新加坡国家研究基金会;

关键词：

Carbon nanotubes; Cement composite; Nanotechnology; Bonding behavior; Mercury intrusion porosimetry; FE-SEM; Pullout test; MECHANICAL-PROPERTIES; CONCRETE; STRENGTH; MICROSTRUCTURE; TOUGHNESS; CORROSION; STRESS; FIBER; PASTE;

D O I：

10.1016/j.compstruct.2020.112201

中图分类号：

O3 [力学];

学科分类号：

08 ; 0801 ;

摘要：

Bonding between reinforcing bars and cement was enhanced using multi-walled carbon nanotubes (MWCNTs). To investigate the bonding behavior between the composites and a reinforcing bar, 20 bond strength test specimens were fabricated and a pullout test was performed. Additionally, the compressive strengths of MWCNTcementitious composites were evaluated with different MWCNT concentrations. To analyze the internal structural mechanisms of MWCNT cementitious composites, mercury intrusion porosimetry (MIP) and field emission scanning electron microscopy (FE-SEM) were conducted. The results demonstrated that 0.5 wt% MWCNTs increased the compressive strength of the cementitious composites and enhanced the bonding between the cement composite and the reinforcing bar.

引用

页数：10

共 52 条

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